The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

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  • Squidwrench Electronics Workshop: Session 6 Whiteboards

    Coverage of capacitors as charge-storage devices, rather than filters:

    Session 6 - Whiteboard 1 - overview
    Session 6 – Whiteboard 1 – overview

    We avoided all the calculus and derivations, taking the exponential waveform as a given for RC circuits:

    Session 6 - Whiteboard 1 - exponential detail
    Session 6 – Whiteboard 1 – exponential detail

    Discussions of dielectrics, plate spacing / area, and suchlike:

    Session 6 - Whiteboard 1 - dielectric permittivity
    Session 6 – Whiteboard 1 – dielectric permittivity

    Some handwaving discussion of construction, electrolytic capacitor innards, and The Plague:

    Session 6 - Whiteboard 1 - cap construction
    Session 6 – Whiteboard 1 – cap construction

    A 1 F cap charged through a 1.8 kΩ resistor during most of the session to show what an 1800 s time constant looked like. Nope, it never quite got to the 3.5 V from the power supply, even when we all decided it was time to shut down!